Bushing-blank and process of making bushings.



wfl. GIBBONS.

BUSHING BLANK AND PROCESS OF MAKING BUHINGS.

APPLICATION FILED JULY19,I9I8.

1,297,142. Patented Mar. 11,1919.

UN TE STATES PATENT ormcn. i

WILLIAK J. GIBBONS, F PHI ADELPHIA, PENNSYLVANIA.

BUSHING-BLAH K AND-PROCESS OF MAKII IG BUSHINGS.

To all whom it may concern:

Be it known that I, WILLIAM J. GmBoNs,

I a citizen of the United States, and a resldent of- Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented an Improvement in Bushing-Blanks and Processes of Making Bushings, of which through whichthe electric wires and cables of the electric installation of such ships are V carried. If these wires and cables were drawn through the openings in the steel plates with the hard, sharp edges of .the lattel uncovered so that they would contact directly with the insulating covering of the wines and cables,,such insulation "would be cut and broken, which might result in short circuiting the wires thereof.

' It is the object of my invention to provide a bushing blank (in which the formation of the bushing has been partially completed) which may be readily-and easily placed in openings through the ships plates and up-set and formed into a bushing there in with smooth, rounded edges.

A further object of my invention is to provide a blank of such construction that when the bushing has been formed therefrom in an opening, both end portions of said bushing will fit tightly and closely against the inclosing or encircling portions of the opening. V

A still further object of my invention is to.provide a bushing blank preferably by molding, although itmay be formed otherwise, provided with a crown atone end, and in which said crown is provided with a projection or projections constituting 'an excess of metal which is adapted to be forced into and merged with the body of said crown, so-

' as to insure a tight fit of the latter in the opening in which the finished bushing is located.

Further objects and advantages of my invention will be particularly referred to and pointed out in the detailed description thereof which follows, or will be apparent from the said description to any oneslnilled in the art to which it relates. In order that my invention may be readily understood and its practical, commercial advantages fully Specification of Letters Patent. Patented M 11, 1919; Application filed July 19, 1918. Serial No. 245,704.

may be had to the accompanying drawing in .appreciated and comprehended, reference which I have illustrated certain forms of 1 construction embodying the same.

In the drawing:

Figure 1 is a perspective view of a por tion of plate having an opening in which is situated a bushing blank embodying my invention;

Fig. 2 is a bushing blank embodying my invention;

Fig. 3 is a transverse, sectionalview of a plate provided with an opening having therein a bushing blank, shown in longitudinal section, embodying my invention;

Fig. 4 is a view similar to that shown in Fig. 3, but showing the bushing in a completed state formed from the blank shown in Fig. and

'Fig. 5 is a plan View of the crown end of a bushing blank, showing a modified con- StI'llCtllOIl of the same.

Referring to the drawing, 1 designates an iron or steel plate, or for that matter, a plate of any other hard material, provided with an opening 1 in which is situated a bushing blank 2, embodying my invention.

The bushing blank 2, as is clearly apparent from Figs. 2 and 3, consists of a tubular body portion which extends through the opening and which terminates in an annular crown portion 3. In the employment of the blank, the body portion is inserted through an opening, after which the end opposite that of the crown 3 is up-set by the employment of lip-setting dies such as are shown in my co-pending application filed July 5, 1918, Serial No. 243,278. It has been found, however, that when the bushing blanks previously provided with a crown such as is shown at 3 have been employed without the provision of means for supplying an excess of metal, the end of said bushing provided with the previously formed crown 3 does not fit as closely and tightly in the opening as it should, and furthermore, appears to be slightly weakened at its corners. I have discovered that this difficulty may be obviated by providing an ex cess of metal, which, upon the employment of the up-setting dies of the character shown in my co-pendingapplication aforesaid to complete the formation of the bushing with in the opening, is forced and merged into and becomes a part of the body of the crown 3. In Figs. 2 and 3 this excess of metal consists of an annular head 4%, which extends entirely around the apex of the crown 3. In the completion of the formation of the hushing Within the openings, the crown 3 is seated in one of the annular grooves of an lip-setting die with the edge of the annular bead resting against the bottom thereof. /Vhen the opposing co-acting die is placed against the opposite end of the bushing blank 2 upon the opposite side of a. plate such the plate 1, and opposing forces applied to the said dies, the opposite end is up-set as indicated at 5, While the bead is merged into the crown 3, leaving a. perfectly formed, smooth, rounded surface, as shown at the upper side of By forcing the metal of the annular bead l into the crown 3, the amount of metal in the said crown is increased so that the same is slightly thickened and strengthened, and also so that the end of the said loushin, is caused to fit closely and tightly against the encircling. inclosinn' portion of the opening 1 through the plate 1V in Fig. 5, l have, shown a. construction ol bushing blank embodying the same principle as that disclosed in the preceding Figs. 1 to l of the drawing, the difference being that in said Fig. 5 the excess of metal is com prised in a series of projections s. Four only of these projections are shown. will be understood, however, that the number and also the shape of these projections may be varied as desired.

The essential idea of my invention is that there shall be provided upon the prc-t'ormcd crown of the bushing; an excess of metal, which, during the operation of completing the formation of the bushing in an openin is driven or compressed into and merged with the metal of the crown to thicken and compact the same and to force it firmly and in'nnovably against the iuclosine' and encirclingsides of the opening.

Although l have described my invention relating to bushings as and for the purpose stated, yet it will be understood that it not to be limited to the particular use designated, nor is it limited to the construcneo /nee tion of bushing alone, but the principle acters employed for the purposes for which such devices may be used.

1 claim:

1. A bushing blank, provided at one end with a crown having projections thereon constituting additional metal which is adapted to be forced into the said crown upon the completion of the bushin 2. A hollow section of tubing having an annular enlargement upon one end, said enlargement being provided with a projection constituting an excess of metal, adapted to be merged into and with the metal of the enlargement upon the application of pressure in opposite directions upon the opposite ends of the said section of tubing.

3. A bushing blank. consisting of a tubular section of relatively soft metal. having ahead portion at one end. which portion is provided with a bead-like projecting portion which is adapted to be forced and merged into the said head portion upon the application of pressure against the same.

4. A bushing blank, consisting of a tubular section 01 relatively soft metal, terminating; at one end in a crown portion. the. said crown portion having at its apex a pro jcction. the metal of which is adapted to be forced into and merged with the metal of the said crown upon the application of pressure thereto.

5. The process oi making a metal bushing or hollow rivet which consists in first forming a tubular portion terminating in a crown at one end, forming upon said crown a. projection constituting an excess of metal and thereafter applying" opposing pressure to the opposite ends of said tubular portion and forcing the said excess of metal into and merging the same with the preformed crown. substantially as described.

in testimony that l claim the foregoing as my invention. l have hereunto set my hand this 17th day of July, A. D. 1918.

ll llilililhl .l'. Gllllltlll'fd. 

